The word "strand"( the first sentence in the second paragraph) is closest in meaning to the word ______.

A．should not assume the roles of housewives at all.
B．men should share homemaking with their wives
C．no other roles should be offered to women than being housewives
D．women should assume the roles of housewives only temporarily

A．Because he sought to become the only composer of his time to challenge accepted musical conventions.
B．Because he adopted a new principle of organization in his work by utilizing innovative strategies.
C．Because he creatively manipulated the accepted rules and forms governing musical composition.
D．Because he synthesized a transition between the older stylistic convention and the newer musical form.